Key mechanism for typewriting machines



Jan. l 613 195 4 1927 L. RElscHl. KEY -MECHNISM FOR TYPEWRITING MACHINES original Filed April 20. i923 Patented Jan. 4, 1927.

srA'rss LUDWIG REISCHL, F NUREMBERG, GERMANY,.ASSIGNOR TO RING-WERKE, VURM.

GEBR. BING A-G, 0F NUREMBERG, GERMANY. l

KEY MECHNISMI FOR TYJPEWR/ETING MACHINES.

@riginal application lecl April 20, 1929', Serial Nofsw, and in Germany September 1, 1922. )Divided and this application medDeeember 2, 1925. Serial No. 72,820.

'llhis invention relates to a key lever su port for typewriting machines in which, t e intermediate levers and key levers are guided in lli-shaped and angular slotted sheet-metal members which form a sheet metal frame in a manner described and shown4 in the specication filed with my prior application No. 633,499 tiled April 20, 1923 of :which this application is a division. In key-mecha- 0 msm-frameset this known type the axle for the intermediate levers is rigidly inserted between the two faces of the arms or the lll-shaped member, the axle for the key levers continuing freely so that this axle can easily 5 bend and oscillate. This invention has for its objecta new construction of the key mechamsm-trame, according to which the axles are held as much as possible free from oscillations. rlhe trame according to the invention 0 consists ci two slotted sheet metal members of U-shaped cross section, the webs of which members have bearin plates for holding the axles for the interme iate levers and key levers, said bearing plates being arranged atl 5 convenient distances apart, the two sheet metal members being connected at the ends the one with the other by short transverse angle irons. lin this manner a simple keymechanism frame is produced which is cheap l to manufacture and in which the entire key mechanism is .mounted so that all the. elements as a whole can be easily inserted into the machine.

ln the accompanying drawing the invention is illustrated.

Fig. 1 shows the key mechanism traine in cross sect-ion. A n

Fig. 2 shows a plan view of a portion of this frame. I 'lhe key mechanism consists of the key Vlevers 1 of usual type, yof the intermediate.

levers 22 and ot the type levers 17. The key levers 1 are 'connected with the intermediate levers 22 by means of4 studs '23 of the key levers' engaging each with a fork- 'shaped guide 24 of the corresponding intermediate lever 22. The intermediate levers '22 are connectedwith a typelever 17 by means of studs 25 of the intermediate levers on which the hook-shaped ends `26 ot the 50 type levers are hooked. The type levers 17 are mounted by means of hooks in the'well known manner on the curved axle 18 ot' the typ'e lever segment 19.

A frame fixed between the two side walls 15 of the machine frame is composed ot two angl' irons 27 and of sheet metal bearers 28,

29 and 30. The bearer 28 is xed on the flanges 31 of the angle iron 27 and it consists of'a sheet metal member of lli-shaped @0 cross section. The two arms 32 and 33 ot the U-shaped member 28 have slits 3d desi ned to guide the intermediate levers 22. Tiese intermediate levers 22 are pivotally mounted on anaxle or rod 35 mounted in @5 cheeks 36 riveted on the web of the U-shaped member 28. The bearer 29 is of angular. cross section vand serves for the attachment of the pull springs 12' for the ke levers 1. The member 30 is also ot lll-shape Vcrossseclo tion and its web is fixed on the flanges 3l of the angle irons 27. The arm 37 of the U-shaped member 30' situated on the front has slits 38 for guiding the rear ends ot the key levers 1. The rear ends of the key levers 1 are hook-shaped in the well known manner and hooked from below on a rod 39 mounted in cheeks 41 riveted between the arms 37 and 40 on the web of the U-shaped member 30. A rod 42 serves for preventlng 80 the lkey levers 1 from dropping olf the rod 39. f

This mounting and guidin of the keyand intermediate levers in -shaped sheetl metal members is s'ecially adapted, as all 85 the parts are made y stamping, for cheap but accurate manufacture on a large scale particularly as' no milling work is required and as the arts can be put together by un- 'skilled wor en.

A key lever'support for typewritin vmachines comprising in combination wit the intermediate levers, with the key levers and with the axles for said leversa frame com- 95 posed of two sheet metal members of vU- shaped cross section and of two cross memlevers and bearing plates for the axle of the bers the two arms of each U-shaped memintermediate. levers and key levers fixed at ber being spaced widely and the forward convenient distances apart on the webs of 10 one of said members having longitudinal the U-shaped members between the arms of slits for gelding the intermediate levers, said members.

and the rearward one of said members hav- `In testimony whereof I atx m signature. ing longitudinal slits for guiding said key LUDWIG R ISCHL. 

